[1]Wang Qianhua,Zhang Pan,Wang Wei,et al.Regulation of Land Use on Runoff in Typical Watersheds of the Middle Reaches of the Yellow River[J].Research of Soil and Water Conservation,2024,31(03):61-68,78.[doi:10.13869/j.cnki.rswc.2024.03.007]
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Regulation of Land Use on Runoff in Typical Watersheds of the Middle Reaches of the Yellow River
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
31
Number of periods:
2024 03
Page number:
61-68,78
Column:
Public date:
2024-04-30
- Title:
- Regulation of Land Use on Runoff in Typical Watersheds of the Middle Reaches of the Yellow River
- Keywords:
- SWAT model; land use change; threshold; Dali River Basin
- CLC:
- P333.5
- DOI:
- 10.13869/j.cnki.rswc.2024.03.007
- Abstract:
- [Objective] The aim of this study is to examine the regulatory effects and thresholds of different land uses on runoff variations in the middle reaches of the Yellow River, which is crucial for flood control and the high-quality development of the watershed. [Methods] Focusing specifically on the Dali River Basin, the characteristics of land use changes over the past 20 years were analyzed, and the impact of these changes on the annual distribution of runoff was quantitatively assessed by using a monthly scale SWAT model of the basin. Four extreme land use scenarios were set to study the impact of different land use types on flood season runoff. Additionally, 12 different land use coverage scenarios were used to determine the critical coverage of land use that affected watershed runoff. [Results] The predominant land use modes in the Dali River Basin included arable land, grassland, and forest land. Grassland and forestland exhibited an inhibitory effect on runoff, while arable land promoted runoff. The impact coefficients for these land use types were -0.1252,-0.130 1, and 0.122 3, respectively. Land use had a certain regulatory effect on the annual distribution of runoff. However, this effect was not significant when land use changes were small. [Conclusion] Notably, land use coverage demonstrates a significant marginal effect, with a lower critical value of approximately 5% for grasslands and an upper critical value of 95%, as well as an upper critical value of 91% for forests. These findings can provide valuable insights for soil and water conservation efforts, flood control initiatives, and the high-quality development of the watershed.
- References:
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Last Update:
2024-04-30